Yoon, Ki Ro Kim, Jong Min Lee, Kyung Ah Hwang, Chang-Kyu Akpe, Shedrack G. Lee, Yeo Jin Singh, Jitendra Pal Chae, Keun Hwa Jang, Seung Soon Ham, Hyung Chul Kim, Jin Young 2024-01-19T14:32:26Z 2024-01-19T14:32:26Z 2021-10-21 2021-06 0378-7753 https://pubs.kist.re.kr/handle/201004/116917 Ceria coated carbon nanotubes (CeO2@CNTs) were prepared as a versatile support material to improve both the activity and stability of platinum (Pt)-based catalysts. We demonstrated that the CeO2 nanoparticles (NPs) had an extrinsically remote functionalization effect on the Pt electrocatalysis. The CeO2 modulated the electronic structure, and facilitated the O2 adsorption property of Pt without any intrinsic chemical doping or Pt-alloying. This led to d-band electron filling in Pt, and delivery of active oxygens (O- ) to the Pt surface via oxygen spillover at the Pt-CeOx interface, thus enhancing the ORR activity. Furthermore, due to the unique redox behavior between Ce3+ and Ce4+, the dissolved Ce ions could also participate in the radical scavenge reaction, which prevents the chemical degradation of polymeric components in the cell. A single cell using the Pt NPs supported on CeO2@CNT as a cathode catalyst delivered a superior electrochemical performance and a retained durability compared to the cells with pristine CNT supported Pt NPs. English ELSEVIER Activity-stability benefits of Pt/C fuel cell electrocatalysts prepared via remote CeO2 interfacial doping Article 10.1016/j.jpowsour.2021.229798 1 JOURNAL OF POWER SOURCES, v.496 JOURNAL OF POWER SOURCES 496 N scie scopus 000641616800001 2-s2.0-85103426918 Chemistry, Physical Electrochemistry Energy & Fuels Materials Science, Multidisciplinary Chemistry Electrochemistry Energy & Fuels Materials Science Article PERFLUOROSULFONIC ACID MEMBRANES OXYGEN REDUCTION REACTION WALLED CARBON NANOTUBES CHEMICAL DURABILITY CATALYST PLATINUM DESIGN OXIDE PERFORMANCE SUPPORT Proton exchange membrane fuel cells Ceria Platinum catalysts Oxygen reduction reaction Radical scavengers